None**. They operate in the **dark**.
Seven one to change and the other six to sing about how good the old one was.
How many "friend zoned" guys does it take to change a light bulb? None. They just compliment it and get mad when it won't screw.
Two, one to change the light-bulb, and one to observe how it symbolizes an incandescent beacon of subjectivity in a netherworld of cosmic nothingness. This is courtesy of Spencer Reid.(CM)
It takes two. One to change the bulb and the other to kick the switch.
Gingerly
He just couldn't hold it any longer.